Perhaps you should try some spelling variations:
"synthesize" » "synthesis", "synthese"
"synthesized" » "synthesisd", "synthesed"
"synthesiss" » "synthesises", "synthesis", "synthesise"
"synthesised" » "synthesises", "synthesis", "synthesizes"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ("synthesize" OR ("synthesized" OR ("synthesiss" OR "synthesised"))).
• Removing quotes may allow a broader search: ( synthesize or ( synthesized or ( synthesiss or synthesised ))).
• Adding a wildcard symbol may retrieve word variants: ("synthesize" or ("synthesized" or ("synthesiss" or "synthesised")))*.